* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.bigBox {
    width: 800px;
    margin: 100px auto;
}

.nav {
    width: 100%;
    height: 60px;
    position: relative;
}

h2 {
    position: absolute;
    top: 10px;
    left: 0;
}

.plus-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 80px;
    height: 35px;
    outline: none;
    border: 1px solid grey;
    border-radius: 5px;
    cursor: pointer;
}

th {
    width: 200px;
    height: 40px;
    color: white;
    font-size: 10px;
    background-color: grey;
    text-align: center;
}

.modal-header {
    background-color: gainsboro;
}

.title {
    position: absolute;
    top: 5px;
    left: 210px;
}

.collect {
    display: flex;
    flex-direction: column;
    margin-left: 30px;
}

input {
    width: 400px;
    height: 30px;
    border: 1px solid gainsboro;
    outline: none;
    border-radius: 5px;
    text-indent: 1em;
}

.item {
    margin-top: 10px;
}

.table tbody tr {
    height: 30px;
    line-height: 30px;
}